For the last week or so the rear wiper on my 1996 EFI has been doing one sweep of the rear window, before heading south, off the window to rest somewhere on the metal of the rear door, refusing to return without human assistance. Has anyone else experienced this problem? New wiper motor perhaps? Or is there something more simple?

Your welcome although when it's raining and something just won't work it pisses you off and you don't look done it myself loads struggle home in the dark or wet only to look the following day and it's blindingly obvious.

It will probably be broken wires where the loom passes from the body to the tailgate through the rubber grommet.That's what it was when ours stopped working.Just find the break in the wire & make good, it's a bit fiddly.